Pump



Aug. 14, 1928.

J. M. SHIMER PUMP Filed April 13, 1927 2 Sheets-Sheet l Aug. 14, 1928. J- M. S W

PUMP

Filed April 15, 1927 Z'Sheets-Sheet 2 n mi m mE

R O T N E V m UNITED STATES 1,680,479 PATENT \OFFICE.

JOHN M. SHIMER, OF 'WILKINSBURG, PENNSYLVANIA, AS SIGNOR TO WILSON-SNYDER MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

PUMP.

Application filed April 13, 1927. Serial No. 183,356.

This irivention relates to pumps and more particularl to an improved system for lubricating t 1e valve operating mechanisms of such pumps as, for example, slush or mud pumps commonly employed in the 011 fields for pumping the slush from a well during drilllng or for pumping any other heavy, viscous material desired.

Due to-the extremely hard usageto which pumps of this class are subjected those lubricating systems employing reservoirs on moving parts are unsatisfactory for the reason that such reservoirs are easily damaged, their covers become warped or lost so as to admit dirt or other material to the lubricant and the system shortly becomes inefi'e ".tive.

An object of this invention is to provide 'a pump of the typeset forth having an improved lubricating system. for the valve operating mechanism. r

A further object is to provide a lubricating system for the purpose set forth of such construction and arrangement as to form'a substantially closed system from which dirt and the like is effectively excluded.

A still further object is to provide an arrangement of the type described which Wlll be rugged and simple in construction, reliable in operation and cheap to. manufacture and assemble.

These and other objects which will be apparent to thoseskilled in this particular art are accomplished by means of the mventlon illustrated in the accompanying drawings, in which Figure 1 is a side elevation ofa duplex pumping unitconstructed in accordance with one embodiment of this invention. Fig. 2 is a similar view on an enlarged scale of certain parts thereof; and Fig. 3 is a sectional view on the line 3-3 of, Fig; 2.

The particular embodiment of'this invention which has been chosen for the purposes of illustration is shown in connection with a duplex pumping unit 5 having the usual parallel piston rods 6 and 7 operating between the steam end 8 and the liquid end 9 of the pump. -The valve chest 10 has the usual steam controlling valves (not shown) which. are operated separately by individual valve stems 11 extending outwardly from the valve" chest inthe usual manner. As is common in duplex units, the valve stem for operatingthe steam valve of one cylinder movement of the piston rod is actuated b d1 the other cylinder.

associated wit A housing 12 is mounted upon the unit and supports two vertically spaced rocker shafts 13 and 14. The upper shaft is oscillated by an actuating'lever 15 having a bellshaped hub 16 secured to the shaft and the opposite end of the lever is provided with a roller 17 received within a cross head 18 secured to the associated reciprocating piston rod 7. The opposite end of the upper rocker shaft 13 has a crank 19 having a bell-shaped hub 20 secured to the shaft. The crank 19 is bifurcated, see Fig. 3, and is connected to the associated valve stem 11 by a connecting link 21 of special form. The connecting link includes a channeled link head member 22 which is secured within the bifurcations of the crank by a suitable securlng pin 23. The link head member is provided with a lubricant channel 24:, see

Fig. 3, communicating withthe interior of a hollow pm 25, the opposite end of which is secured to a second link head 26 having a bore 27 communicating with the interior of the hollow connecting the valve stem 11.

- The bell-shaped hub of thecrank 19 is provided with an annular lubricant channel 29 and a hole 30 is, drilled through the hub so as to form a passageway for lubricant from the channel 29 to the bifurcated crank 19. The bell-shaped hub 16 of the valve mechanism operating lever, 15 is provided with a similar annular channel 31 forming, a lubricant passageway and a ,drilled hole 32 leads from this passageway t a lubricant conveying tube 33 mounted within a groove 34: in the inner face of the lever. The tube extends downwardly to the roller connection pin and leading to a pin 28 head 26 with the associated 17 between the lever and the associated pisrocker shaft and provided with an annular channel 11 forming alubricant passageway from which lubricant flows to the roller 38 through a drilled opening 42 in the hub communicating at one end with the annular channel and at the other with a lubricant.

channeled link head member 47 and similar.

in all respects to the connecting link 21. A lubricant opening 48 is formed in the hub 16 of the lever 15 for the purpose of sup lying lubricant to the channeled link hea 47 from the lubricant passageway 32 in the lever hub 16. Lubricant is conveyed fromthe reservoir 35 to the bearin for the lower rocker shaft through a, valve controlled pipe 49.

It will be readily apparent that lubricant flows from the reservoir 35 through the pipe 36 to the upper rocker shaft 13 within the housing 12 and along this shaft in one direction to the bell-shaped hub 16 of the valve actuating lever 15 where it is received within the passage formed by the annular channel 31 and from which it flows through the passage 32 and tube 33 to the roller 17 connecting the lever to the associated piston. A. part of the lubricant within the passage 32 will flow through the hole 32 into the interior of the channeled link head member 48 so as to lubricate the entire connecting link assembly. Lubricant will also flow in the other direction along the rocker shaft 13 to the bell-shaped hub 20 of the crank 19 at the opposite end of the shaft from the operating lever 15 through the passageway formed by the channel 29 and opening 30 to the channeled link head member 22 so as to lubricate the pin 23 connecting such member to the crank 19. The elongated channels rovided in the respective link head memers 22 and 47 form, in effect, secondary reservoirs from which lubricant flows through the associated hollow connecting links 25 and link head members 26 to the pins 28 connecting the latter to the respective valve stems-11.

Lubricant also flows from the reservoir 35 through the pipe 49 to the lower rocker shaft 14 within the housing 12 and through the bell-shaped hub 40 of the associated valve operating lever 37, through the passageway formed by the annular channel 41 and hole 42 to the tube 43 and thence to the roller 48 connecting'tlie lever to the cross head 39 on the valve stem 6..

It will be apparent that the present invention provides a lubricating system for the valve mechanismof such character as to be substantially a closed system into which it is practically impossible for dirt or other matter to penetrate even under the most arduous use. The arrangement is such that a reservoir'of considerable capacity can be employed and the lubricant is positively conveyed to each of the moving parts.

Although I have described what I now consider to be the preferred embodiment of this invention it will be apparent that various changes, additions, substitutions and omissions can be made therein without departing from the spirit of this invention or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. The combination in a pump having a valve operating mechanism including a lever mounted on a pivotal support, a piston rod, a connection between said rod and said lever for oscillating said lever, means for supplying lubricant to said support and a passage for conveying lubricant from said support to said connection.

2. The combinationin a pump having a valve operating mechanism including a lever mounted on a pivotal support, a piston rod provided with a cross head, a roller on said lever cooperating with said cross head, means for supplying lubricant to said sup port and a closed connection extending along said lever for conveying lubricant from said support to said roller.

3. The combination in a pump having a valve operating mechanism including an op erating lever, a shaft supporting said lever, a connection between said lever and the piston of said pump for operating said.lever, a valve stem and a connection including a hollow link between said valve stem and said lever, means for supplying lubricant to said shaft, passages for conveyin lubricant from said shaft to said hollow link and a passage for conveying lubricant from said shaft to said piston connection.

4. The combination in a pump having a valve operating mechanism including a rocker shaft and a valve stem, a connection between said shaft and said stem including a hollow link, a securing pin at each end of said link and passages for conveying lubricant from said shaft to the interior of said hpllow link for supplying lubricant to said ins. p 5. The combination in a pump having a valve operating mechanism ncluding a rocker shaft, a valve stem, a crank on said shaft, a connection between said stem and said crank including a hollow link head sccured to said crank, a second link member secured to said stem, a hollow'member connectin said link members, a reservoir for supplying lubricant to said shaft and passages extending through said crank for conveying lubricant from said shaft to said links.

6. The combination in a pump having parallel piston rods and a valve mechanism adapted to be actuated thereby, of separate vertically spaced rocker shafts, a lever secured to each of said shafts and provided with a roller for cooperating with a cross head on the associated piston rod for rocking said shafts, each rocker shaft, means for supplying lubricant to each of said rocker shafts, passages associated with each lever for conveying lubricant from the associated shaft to each roller, passages for conveying lubricant from said upper shaftto its valve stem connection and a by-pass for conveying lu bricant from said upper shaft to the valve stem connection of said lower shaft.

7. The combination in a pump having a valve operating mechanism including a lever having a hub mounted on a pivotal support, a piston rod provided with a crosshead, a roller on said cross head, means for supplying lubricant to said support, a lubricant conveying passage extending along said lever for conveying lubricant to said roller and a passage extending through said hub for conveying lubricant from the supply in said support to said first named passage.

8. The combination in a pump having a valve operating mechanism including a le a valve stem connected to lever co-operating with said ver, a shaft supporting said lever, a valve stem and a connection including a hollow link between said valve stem and said lever, means for supplying lubricant to said shaft and passages extending through said lever for conveying lubricant from said shaft to said hollow link.

9. The combination in a pump having parallel piston rods and a'valve mechanism adapted to be actuated by each of said rods, of separate rocker shafts, a lever secured to each of said shafts and having a connection with an associated pistonrod so as to rock said shafts, a-valve stem associated with each of said shafts, a connection between each stem and the associated shaft, mechanism for supplying lubricant to each shaft, passages for conveying lubricant from one shaft to the connections between each shaft and each associated valve stem, passages for conveying lubricant from said shaft to the associated piston connection and passages for conveying lubricant from the other of said shafts to the associated piston connection.

In testimony whereof, I have hereunto' subscribed my name this 11th day of April, 192

J OHN M. SHIMER. 

